The world's best-selling grammar series for learners of English. A reference and practice book for learners of English at advanced (C1-C2) level. Perfect for self-study, but also ideal for ...

Sometimes when we are talking about past events, we want to refer to something that was in the future at that time. In order to do this, we use the past tenses of verbs we would normally use to ...

but you want to improve your English. To begin, take a test, and the app automatically generates a lesson plan. Continue your ...

Relative clauses are used to give additional information about a noun, such as a person, place or thing. Relative pronouns introduce a relative clause. They include who for people, that and which ...